My response was to the OP, not what you have written Peter.
As for why does Tracker not do its job - no idea, but is often the case. I recall answering this in many cases when we used TJC - I used to give the terminal commands, but it is easier to direct someone to Jolla Store for Sailfish Utilities app.
EDIT: I’ve just read this question here on FSO; Sharing from 'Documents' impossible where the last response from Karry is also suggestive of tracker/indexing problems, but this also includes issues with ‘Sailjail’ which I did not think about in this instance.